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Message-Id: <20230807111631.3033102-1-john.g.garry@oracle.com>
Date: Mon, 7 Aug 2023 11:16:31 +0000
From: John Garry <john.g.garry@...cle.com>
To: irogers@...gle.com, acme@...nel.org
Cc: linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org,
ilkka@...amperecomputing.com, John Garry <john.g.garry@...cle.com>
Subject: [PATCH] perf jevents: Raise exception for no definition of a arch std event
Recently Ilkka reported that the JSONs for the AmpereOne arm64-based
platform included a dud event which referenced a non-existent arch std
event [0].
Previously in the times of jevents.c, we would raise an exception for this.
This is still invalid, even though the current code just ignores such an
event.
Re-introduce code to raise an exception for when no definition exists to
help catch as many invalid JSONs as possible.
[0] https://lore.kernel.org/linux-perf-users/9e851e2a-26c7-ba78-cb20-be4337b2916a@oracle.com/
Signed-off-by: John Garry <john.g.garry@...cle.com>
---
Please do not apply before [0], above.
diff --git a/tools/perf/pmu-events/jevents.py b/tools/perf/pmu-events/jevents.py
index 8cd561aa606a..98cccc3fcbbd 100755
--- a/tools/perf/pmu-events/jevents.py
+++ b/tools/perf/pmu-events/jevents.py
@@ -347,12 +347,15 @@ class JsonEvent:
if self.desc and not self.desc.endswith('. '):
self.desc += '. '
self.desc = (self.desc if self.desc else '') + ('Unit: ' + self.pmu + ' ')
- if arch_std and arch_std.lower() in _arch_std_events:
- event = _arch_std_events[arch_std.lower()].event
- # Copy from the architecture standard event to self for undefined fields.
- for attr, value in _arch_std_events[arch_std.lower()].__dict__.items():
- if hasattr(self, attr) and not getattr(self, attr):
- setattr(self, attr, value)
+ if arch_std:
+ if arch_std.lower() in _arch_std_events:
+ event = _arch_std_events[arch_std.lower()].event
+ # Copy from the architecture standard event to self for undefined fields.
+ for attr, value in _arch_std_events[arch_std.lower()].__dict__.items():
+ if hasattr(self, attr) and not getattr(self, attr):
+ setattr(self, attr, value)
+ else:
+ raise argparse.ArgumentTypeError('Cannot find arch std event:', arch_std)
self.event = real_event(self.name, event)
--
2.35.3
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